glut | 易学教程

Why does glGetString(GL_VERSION) return null / zero instead of the OpenGL version?

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问题 I'm on Linux Mint 13 XFCE. My problem is that when I run in terminal the command: glxinfo | grep "OpenGL version" I get the following output: OpenGL version string: 3.3.0 NVIDIA 295.40 But when I run the glGetString(GL_VERSION) in my application then the result is null. Why doesn't this code get the gl_version ? #include <stdio.h> #include <GL/glew.h> #include <GL/gl.h> #include <GL/glu.h> #include <GL/glut.h> #include <GL/glext.h> int main(int argc, char **argv) { glutInit(&argc, argv);

How do I draw text with GLUT / OpenGL in C++?

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问题 How do I draw a text string onto the screen using GLUT / OpenGL drawing functions? 回答1: There are two ways to draw strings with GLUT glutStrokeString will draw text in 3D (source: uwa.edu.au) and glutBitmapString will draw text facing the user (source: sourceforge.net) 回答2: If you don't like the built-in stroke font or bitmap font that comes with GLUT as per epatel's answer, you'll have to roll your own solution. NeHe has some good tutorials (along with fully-working sample code) on this:

Initializing OpenGL without GLUT

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问题 every introduction and sample that I can find seems to use GLUT or some other framework to "initialize" OpenGL. Is there a way of initializing OpenGL with just what is available in GL and GLU? If not, then what is GLUT doing that is not possible without it? 回答1: As luke noted, the code to create and bind the context is specific to each windowing platform. Here are some functions to get you started in terms of initializing OpenGL on specific platforms: Windows (a tutorial is here)

GLUT on OS X with OpenGL 3.2 Core Profile

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问题 Is it possible to use GLUT on OS X Lion or OS X Mountain Lion using core profile (so I can use GLSL 1.50)? Can I use the built in GLUT or do I need to use a third-part library such as FreeGLUT? And is there any simple 'Hello world' applications available for OS X with either an XCode project or a make-file? 回答1: You need at least Mac OS X Lion (OS X 10.7 or higher) for the basic support of OpenGL 3.2. To use the OpenGL 3.2 Core Profile, just add glutInitDisplayMode(GLUT_3_2_CORE_PROFILE | ...

How to compile for Windows on Linux with gcc/g++?

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I have written some effects in C++ (g++) using freeglut on Linux, and I compile them with g++ -Wall -lglut part8.cpp -o part8 So I was wondering if it is possible to have g++ make static compiled Windows executables that contains everything needed? I don't have Windows, so it would be really cool, if I could do that on Linux :) mingw32 exists as a package for Linux. You can cross-compile and -link Windows applications with it. There's a tutorial here at the Code::Blocks forum . Mind that the command changes to x86_64-w64-mingw32-gcc-win32 , for example. Ubuntu, for example, has MinGW in its

How do you install GLUT and OpenGL in Visual Studio 2012?

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问题 I just installed Visual Studio 2012 today, and I was wondering how can you install GLUT and OpenGL on the platform? 回答1: OpenGL should be present already - it will probably be Freeglut / GLUT that is missing. GLUT is very dated now and not actively supported - so you should certainly be using Freeglut instead. You won't have to change your code at all, and a few additional features become available. You'll find pre-packaged sets of files from here: http://freeglut.sourceforge.net/index.php

How to use GLUT/OpenGL to render to a file?

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问题 I have a program which simulates a physical system that changes over time. I want to, at predetermined intervals (say every 10 seconds) output a visualization of the state of the simulation to a file. I want to do it in such a way that it is easy to \"turn the visualization off\" and not output the visualization at all. I am looking at OpenGL and GLUT as graphics tools to do the visualization. However the problem seems to be that first of all, it looks like it only outputs to a window and can

How to compile for Windows on Linux with gcc/g++?

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问题 I have written some effects in C++ (g++) using freeglut on Linux, and I compile them with g++ -Wall -lglut part8.cpp -o part8 So I was wondering if it is possible to have g++ make static compiled Windows executables that contains everything needed? I don\'t have Windows, so it would be really cool, if I could do that on Linux :) 回答1: mingw32 exists as a package for Linux. You can cross-compile and -link Windows applications with it. There's a tutorial here at the Code::Blocks forum. Mind that